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TiO 2 nanomaterials are one of the most significant nanomaterials among the various metal oxide semiconductors family. The TiO 2 nanomaterials exhibit good chemical and biological stability, nontoxicity, high degradation efficiency and good permeability. Hence TiO 2 nanomaterials are used for the photodegradation of organic pollutants, toxic dyes and other forms of environmental contaminants. In this work, the anatase TiO 2 nanomaterials were efficiently synthesized via a solvothermal method, with crystallite sizes ranging from 6.8-7.1 nm. The morphological observations revealed that various shapes and sizes of microparticles were formed by the agglomeration of nanoparticles. The energy-dispersive X-ray analysis confirmed that the titanium-oxygen stoichiometric ratio was approximately 1:2. The energy band gap of TiO 2 nanomaterials was in the range of 3.02-3.12 eV. The photoluminescence study showed that anatase TiO 2 nanomaterial (T2) is ascribed to the selftrapped excitons, surface states and oxygen vacancies. The T2 sample has shown red-shifted with a high surface area (183.17 m 2 /g) and large pore size (4.58 nm), which helps to achieve photocatalytic degradation of methyl orange up to 90% within 30 min of mercury light irradiation. The scavenger test indicated that h + radicals are important reactive species in the photodegradation process.

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